Create coding-3.java

[Praniksha123]

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[super30admin]

Pascal's Triangle (coding-3.java)

1. Wrong Problem: The submitted solution solves the "K-diff Pairs in an Array" problem, not "Pascal's Triangle". Please ensure you read and solve the correct problem.

2. Correctness: Since this solves a different problem, it cannot be evaluated for correctness on Pascal's Triangle.

3. For Pascal's Triangle, a correct approach would be:

   • Start with the first row [1]
   • For each subsequent row, add 1 at the beginning and end
   • Each middle element is the sum of the two elements above it from the previous row

4. Code Quality: The submitted code is well-structured for its intended problem (K-diff Pairs), with clear comments and logical flow. However, it doesn't address the assigned problem at all.

5. Recommendation: Please implement the Pascal's Triangle solution using the reference approach or your own valid algorithm.

VERDICT: NEEDS_IMPROVEMENT

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K-diff Pairs in an Array

Strengths:

• Excellent approach using frequency counting that naturally handles uniqueness
• Clean separation of k==0 and k>0 cases
• Well-documented with clear comments
• More efficient than the reference solution (avoids unnecessary set of vectors)
• Correctly handles edge cases

Areas for Improvement:

• Could add early return for empty array edge case (though constraints say n >= 1)
• The variable name n is used but could be more descriptive like length
• Consider using Integer wrapper explicitly in enhanced for-loop for map.values() iteration (minor)

Note: The student's solution is actually superior to the reference solution in terms of efficiency and correctness. The reference solution has potential issues with duplicate handling and uses unnecessary data structures.

VERDICT: PASS